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ABP Pediatric Gastroenterology study materials
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ABP Pediatric Gastroenterology practice questions

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Question 1Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 3-week-old exclusively breastfed infant presents with projectile non-bilious vomiting and a palpable olive-shaped mass in the right upper abdomen. Which electrolyte abnormality is most characteristic of this condition?

  1. Hyperchloremic hyperkalemic metabolic acidosis
  2. Hypochloremic hypokalemic metabolic alkalosis Correct answer.
  3. Hypernatremic dehydration with metabolic acidosis
  4. Hypoglycemia with respiratory alkalosis

Explanation

Pyloric stenosis causes repeated loss of gastric acid (HCl), producing a hypochloremic, hypokalemic metabolic alkalosis with paradoxical aciduria. The vomiting is non-bilious because the obstruction is proximal to the ampulla of Vater.

Question 2Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following is the most common cause of acute upper gastrointestinal bleeding in children?

  1. Esophageal varices
  2. Gastric cancer
  3. Mallory-Weiss tear
  4. Peptic ulcer disease Correct answer.

Explanation

Peptic ulcer disease and gastritis are the leading causes of acute upper GI bleeding in children. Varices occur mainly in children with portal hypertension and are less common overall.

Question 3Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 7-year-old presents with a 2-week history of bloody diarrhea, tenesmus, and crampy abdominal pain. Colonoscopy shows continuous inflammation from the rectum extending proximally with loss of vascular pattern. Which diagnosis is most likely?

  1. Celiac disease
  2. Irritable bowel syndrome
  3. Crohn disease
  4. Ulcerative colitis Correct answer.

Explanation

Ulcerative colitis classically produces continuous, diffuse mucosal inflammation beginning in the rectum and extending proximally. Crohn disease tends to be patchy and may spare the rectum.

Question 4Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which finding on liver biochemistry most strongly suggests biliary atresia in a 6-week-old with jaundice?

  1. Isolated hypoglycemia with normal bilirubin
  2. Unconjugated hyperbilirubinemia with low gamma-glutamyl transferase
  3. Elevated serum transaminases with normal bilirubin
  4. Conjugated hyperbilirubinemia with elevated gamma-glutamyl transferase Correct answer.

Explanation

Biliary atresia causes cholestasis with a direct (conjugated) hyperbilirubinemia and elevated GGT reflecting biliary obstruction. Any infant jaundiced beyond 2 weeks should have fractionated bilirubin measured.

Question 5Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 10-year-old with known type 1 diabetes presents with nausea, abdominal pain, and vomiting. Which single test best distinguishes diabetic ketoacidosis from acute gastroenteritis?

  1. Stool culture
  2. Abdominal ultrasound
  3. Serum amylase
  4. Blood beta-hydroxybutyrate and blood gas Correct answer.

Explanation

Measurement of ketones together with a blood gas demonstrating metabolic acidosis confirms ketoacidosis. Amylase and imaging do not reliably separate the two conditions.

Question 6Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following is the recommended first-line treatment for a child with newly diagnosed Helicobacter pylori-associated peptic ulcer disease?

  1. Amoxicillin monotherapy for 2 weeks
  2. H2 receptor antagonist alone for 8 weeks
  3. Proton pump inhibitor alone for 4 weeks
  4. Proton pump inhibitor combined with two antibiotics Correct answer.

Explanation

Eradication requires a proton pump inhibitor plus at least two antibiotics to overcome resistance and achieve high cure rates. Monotherapy reliably fails to eradicate H. pylori.

Question 7Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 4-year-old presents with painless rectal bleeding and a bright red, jelly-like stool. Which diagnosis should be suspected first?

  1. Juvenile polyp
  2. Meckel diverticulum
  3. Intussusception Correct answer.
  4. Anal fissure

Explanation

The classic triad of colicky abdominal pain, currant-jelly stools, and a palpable sausage-shaped mass points to intussusception. Bloody mucus stools in a toddler warrant urgent evaluation for this condition.

Question 8Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following best describes the mechanism of lactose intolerance in a school-aged child?

  1. Excessive secretion of chloride in the colon
  2. Bacterial overgrowth in the stomach
  3. Deficiency of intestinal lactase causing osmotic diarrhea Correct answer.
  4. Autoimmune destruction of intestinal villi

Explanation

Lactose intolerance results from reduced lactase activity, so undigested lactose is fermented and exerts an osmotic effect, producing bloating and diarrhea. It is not an immune-mediated process.

Question 9Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 12-year-old with a 6-month history of failure to thrive, abdominal distension, and diarrhea is found to have anti-tissue transglutaminase IgA antibodies. Which dietary change is the definitive treatment?

  1. Gluten-free diet Correct answer.
  2. Lactose-free diet
  3. Low-FODMAP diet
  4. High-protein diet

Explanation

Celiac disease is treated with lifelong strict avoidance of gluten, which allows mucosal healing. Serology should be confirmed by biopsy while the patient is still on a gluten-containing diet.

Question 10Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 2-day-old formula-fed newborn is jaundiced with a total bilirubin of 22 mg/dL. Which factor most increases the risk of bilirubin-induced neurologic damage?

  1. Breastfeeding
  2. Prematurity and low birth weight Correct answer.
  3. Conjugated hyperbilirubinemia
  4. Maternal blood type O

Explanation

Prematurity and low birth weight lower the threshold for kernicterus because of immature hepatic conjugation and an immature blood-brain barrier. Unconjugated bilirubin is the neurotoxic fraction.

Question 11Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following is the most appropriate initial management for a hemodynamically stable child with an acute esophageal variceal bleed?

  1. Oral beta-blocker therapy alone
  2. Immediate surgical shunt placement
  3. Octreotide infusion plus endoscopic band ligation Correct answer.
  4. Nasogastric lavage with cold saline

Explanation

Vasoactive therapy with octreotide reduces portal pressure while endoscopic band ligation controls the bleeding source. Resuscitation and airway protection accompany these measures.

Question 12Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 9-year-old presents with colicky periumbilical pain, vomiting, and passage of bloody stools after a recent upper respiratory infection. Abdominal examination reveals a tender, sausage-shaped mass in the right lower quadrant. Which imaging study is both diagnostic and potentially therapeutic?

  1. Abdominal CT scan
  2. Upper GI series
  3. Air or contrast enema Correct answer.
  4. Abdominal radiograph

Explanation

An air or contrast enema confirms intussusception and frequently reduces it hydrostatically. It is the preferred initial diagnostic and therapeutic modality in stable children.

Question 13Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following is the most common cause of chronic liver disease requiring transplantation in children?

  1. Autoimmune hepatitis
  2. Hepatitis C
  3. Wilson disease
  4. Biliary atresia Correct answer.

Explanation

Biliary atresia is the leading indication for pediatric liver transplantation. Early Kasai portoenterostomy improves native liver survival but many children eventually require transplantation.

Question 14Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 5-year-old with cystic fibrosis has foul-smelling, greasy stools and poor weight gain despite adequate caloric intake. Which intervention is most appropriate?

  1. Increased dietary fat restriction
  2. Pancreatic enzyme replacement with meals Correct answer.
  3. Lactose-free formula only
  4. Oral iron supplementation

Explanation

Pancreatic exocrine insufficiency in cystic fibrosis causes fat malabsorption, so pancreatic enzyme replacement taken with meals and snacks is essential. Fat-soluble vitamin supplementation is also required.

Question 15Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following is the most appropriate first-line pharmacologic treatment for a child with moderate-to-severe ulcerative colitis?

  1. Oral aminosalicylate
  2. Anti-TNF biologic
  3. Systemic corticosteroids Correct answer.
  4. Total colectomy

Explanation

Systemic corticosteroids induce remission in moderate-to-severe ulcerative colitis. Aminosalicylates are used for mild disease, and biologics or surgery are reserved for refractory disease.

Question 16Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 15-year-old with obesity presents with right upper quadrant pain and ultrasound showing gallstones. Which of the following is the most common risk factor for cholelithiasis in this age group?

  1. Hemolytic anemia
  2. Total parenteral nutrition
  3. Cystic fibrosis
  4. Obesity Correct answer.

Explanation

Obesity is a leading risk factor for cholesterol gallstones in adolescents. Hemolytic disease, cystic fibrosis, and prolonged parenteral nutrition are less common contributors.

Question 17Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 3-year-old presents with acute onset of severe epigastric pain radiating to the back, vomiting, and elevated serum lipase three times the upper limit of normal. Which of the following is the most likely cause?

  1. Biliary pancreatitis Correct answer.
  2. Acute appendicitis
  3. Peptic ulcer perforation
  4. Intussusception

Explanation

Lipase elevation greater than three times the upper limit with characteristic pain establishes acute pancreatitis, and biliary causes are common in children. Gallstones and trauma are leading etiologies.

Question 18Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following best describes the mechanism of diarrhea in a child with a secretory enterotoxin-producing infection?

  1. Active chloride secretion with reduced sodium absorption Correct answer.
  2. Osmotic pull of water from undigested solutes
  3. Increased intestinal motility without fluid shifts
  4. Villous atrophy with loss of absorptive surface

Explanation

Secretory diarrhea results from active electrolyte secretion, primarily chloride, with impaired sodium absorption, and it persists despite fasting. Osmotic diarrhea, in contrast, improves with fasting.

Question 19Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 6-year-old has recurrent periumbilical pain relieved by defecation, with no weight loss or nocturnal symptoms. Which diagnosis is most likely?

  1. Crohn disease
  2. Celiac disease
  3. Functional abdominal pain (irritable bowel syndrome) Correct answer.
  4. Intestinal malrotation

Explanation

Pain relieved by defecation without alarm features such as weight loss or nocturnal symptoms suggests a functional disorder. Rome criteria support this diagnosis in children.

Question 20Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following findings is most suggestive of Hirschsprung disease in a newborn?

  1. Failure to pass meconium within 6 hours
  2. Delayed passage of meconium beyond 48 hours Correct answer.
  3. Bilious vomiting with abdominal distension after feeding
  4. Explosive watery diarrhea in the first day

Explanation

Hirschsprung disease results from aganglionosis of the distal colon, and delayed meconium passage beyond 48 hours is a classic presenting feature. Contrast enema and rectal biopsy confirm the diagnosis.

Question 21Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 4-year-old with chronic constipation and soiling has a large fecal impaction on examination. What is the most appropriate initial management?

  1. Daily enemas indefinitely
  2. Immediate surgical referral
  3. Dietary fiber alone
  4. Disimpaction followed by maintenance laxatives and behavioral therapy Correct answer.

Explanation

Functional constipation with impaction requires disimpaction followed by maintenance laxatives and behavioral/toilet training. Fiber alone is inadequate when impaction is present.

Question 22Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following is the most appropriate initial step in the evaluation of a child with suspected food protein-induced allergic proctocolitis presenting with blood-streaked stools?

  1. Elimination of the offending protein from the maternal diet in breastfed infants Correct answer.
  2. Total parenteral nutrition
  3. Immediate colonoscopy
  4. Empiric antibiotic therapy

Explanation

Food protein-induced allergic proctocolitis typically responds to removal of the offending protein, often cow's milk, from the maternal diet in breastfed infants. Symptoms usually resolve within days to weeks.

Question 23Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following is the most appropriate treatment for a child with chronic hepatitis B infection who has active viral replication and elevated transaminases?

  1. Observation without treatment
  2. Corticosteroid therapy
  3. Interferon or nucleos(t)ide analogue therapy Correct answer.
  4. Liver transplantation

Explanation

Children with chronic hepatitis B and active replication with elevated transaminases may benefit from antiviral therapy such as interferon or nucleos(t)ide analogues. Treatment decisions consider age, viral load, and liver histology.

Question 24Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 2-year-old with failure to thrive, diarrhea, and recurrent infections has low serum immunoglobulin and intestinal biopsy showing villous atrophy. Which of the following is the most likely diagnosis?

  1. Cystic fibrosis
  2. Combined immunodeficiency with enteropathy Correct answer.
  3. Celiac disease
  4. Lactose intolerance

Explanation

The combination of failure to thrive, chronic diarrhea, and immunodeficiency with villous atrophy suggests an immunodeficiency-associated enteropathy. Immunologic evaluation is essential.

Question 25Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

Which of the following best describes the recommended approach for a child with suspected non-IgE-mediated cow's milk protein allergy presenting with chronic vomiting and poor growth?

  1. Empiric proton pump inhibitor therapy alone
  2. Trial of extensively hydrolyzed formula with clinical reassessment Correct answer.
  3. Skin prick testing to confirm diagnosis
  4. Immediate oral food challenge

Explanation

Non-IgE-mediated cow's milk allergy is diagnosed by a trial of an extensively hydrolyzed formula with clinical reassessment. Skin prick testing is not reliable for non-IgE-mediated disease.

Question 26Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 3-year-old is brought to the emergency department with lethargy, poor feeding, and a 2-day history of vomiting and diarrhea. On examination, the child has sunken eyes, a capillary refill of 4 seconds, and a heart rate of 150 beats per minute. Which of the following is the most appropriate initial fluid resuscitation?

  1. Oral rehydration solution given by nasogastric tube
  2. 10 mL/kg of 5% dextrose in water as an intravenous bolus
  3. 20 mL/kg of 0.9% sodium chloride as an intravenous bolus Correct answer.
  4. Subcutaneous administration of 0.45% sodium chloride

Explanation

In a child with severe dehydration and signs of shock, an isotonic crystalloid bolus of 20 mL/kg of 0.9% sodium chloride is the standard initial resuscitation. This rapidly expands the intravascular volume while ongoing losses are replaced. Hypotonic fluids or oral routes are inadequate for shock.

Question 27Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 7-year-old with a history of chronic constipation presents with a 2-day history of abdominal pain, distension, and bilious vomiting. Abdominal radiograph shows dilated loops of small bowel. Which of the following is the most likely diagnosis?

  1. Meckel diverticulum
  2. Pyloric stenosis
  3. Small bowel obstruction Correct answer.
  4. Intussusception

Explanation

Bilious vomiting in a child with abdominal distension and dilated small bowel loops on radiograph suggests a small bowel obstruction. Chronic constipation can lead to fecal impaction and obstruction. Intussusception typically presents with colicky pain and bloody stools, and pyloric stenosis occurs in young infants with nonbilious vomiting.

Question 28Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 10-year-old with a 6-month history of intermittent abdominal pain, diarrhea, and weight loss is found to have elevated fecal calprotectin and mucosal inflammation on colonoscopy. Which of the following is the most appropriate initial therapy for induction of remission in moderate-to-severe Crohn disease?

  1. Exclusive enteral nutrition Correct answer.
  2. Oral mesalamine
  3. Loperamide
  4. A lactose-free diet

Explanation

Exclusive enteral nutrition is an effective first-line therapy for induction of remission in pediatric Crohn disease and has the advantage of promoting mucosal healing and nutritional rehabilitation. Mesalamine is not effective for moderate-to-severe disease, and symptomatic treatments do not address inflammation.

Question 29Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 5-year-old is diagnosed with acute pancreatitis. Which of the following is the most common identifiable cause of acute pancreatitis in children?

  1. Abdominal trauma Correct answer.
  2. Hypertriglyceridemia
  3. Gallstones
  4. Viral infection

Explanation

In children, abdominal trauma is the most common identifiable cause of acute pancreatitis, followed by systemic illness and medications. Gallstones and hypertriglyceridemia are less frequent in the pediatric population.

Question 30Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 14-year-old presents with a 3-day history of bloody diarrhea, abdominal cramping, and tenesmus. Stool cultures are negative. Which of the following is the most appropriate next step in evaluation?

  1. Colonoscopy with biopsy Correct answer.
  2. Abdominal ultrasound
  3. Serum amylase and lipase
  4. Stool for ova and parasites

Explanation

In a child with bloody diarrhea and negative stool cultures, colonoscopy with biopsy is the most direct way to evaluate for inflammatory bowel disease and other colonic pathology. Noninvasive tests such as fecal calprotectin can support the diagnosis but do not replace endoscopic evaluation.

Question 31Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 2-year-old is diagnosed with celiac disease based on positive tissue transglutaminase IgA antibodies and confirmatory small bowel biopsy. Which of the following is the cornerstone of management?

  1. Lifelong gluten-free diet Correct answer.
  2. Pancreatic enzyme supplementation
  3. Elemental formula feedings
  4. Corticosteroid therapy

Explanation

The only effective treatment for celiac disease is a strict, lifelong gluten-free diet, which leads to mucosal healing and resolution of symptoms. Medications and other dietary modifications do not treat the underlying gluten sensitivity.

Question 32Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 3-week-old exclusively breastfed infant presents with jaundice, poor weight gain, and pale stools. Laboratory tests show elevated direct bilirubin, elevated gamma-glutamyl transferase, and normal synthetic liver function. Which of the following is the most likely diagnosis?

  1. Physiologic jaundice
  2. Biliary atresia Correct answer.
  3. Breast milk jaundice
  4. Gilbert syndrome

Explanation

Conjugated hyperbilirubinemia with pale stools and elevated gamma-glutamyl transferase in a neonate is highly suggestive of biliary atresia, which requires prompt surgical evaluation. Physiologic and breast milk jaundice cause unconjugated hyperbilirubinemia, and Gilbert syndrome does not cause direct hyperbilirubinemia.

Question 33Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 6-year-old with a history of iron deficiency anemia and pica is found to have a low serum ferritin. Which of the following is the most appropriate next step in management?

  1. Dietary counseling alone
  2. Intravenous iron
  3. Oral ferrous sulfate Correct answer.
  4. Blood transfusion

Explanation

Oral iron supplementation is the first-line treatment for iron deficiency anemia in children, along with dietary counseling. Blood transfusion is reserved for severe symptomatic anemia, and intravenous iron is used when oral therapy fails or is not tolerated.

Question 34Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 9-year-old with a history of recurrent abdominal pain is diagnosed with functional dyspepsia. Which of the following is the most appropriate initial management?

  1. Trial of acid suppression with a proton pump inhibitor Correct answer.
  2. Eradication therapy for Helicobacter pylori
  3. Antibiotic therapy for small intestinal bacterial overgrowth
  4. Upper endoscopy with biopsy

Explanation

For functional dyspepsia in children without alarm symptoms, a trial of acid suppression with a proton pump inhibitor is often used as initial therapy. Endoscopy is reserved for those with alarm symptoms or failure to respond. Helicobacter pylori testing is not routinely recommended in children with functional dyspepsia.

Question 35Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 4-year-old with a 2-day history of profuse watery diarrhea and vomiting is assessed. He is alert, has moist mucous membranes, and a normal heart rate. Which of the following is the most appropriate management?

  1. Antibiotics
  2. Antimotility agents such as loperamide
  3. Intravenous fluid bolus of 20 mL/kg
  4. Oral rehydration solution given in small frequent amounts Correct answer.

Explanation

For mild to moderate dehydration without shock, oral rehydration solution is the preferred treatment and is as effective as intravenous fluids. Intravenous fluids are reserved for severe dehydration or shock. Antimotility and antibiotic agents are not routinely indicated for acute gastroenteritis.

Question 36Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 7-year-old with a history of chronic constipation and soiling is diagnosed with functional constipation. Which of the following is the most appropriate initial pharmacologic treatment?

  1. Loperamide
  2. Senna
  3. Mineral oil
  4. Polyethylene glycol 3350 Correct answer.

Explanation

Polyethylene glycol 3350 is the first-line osmotic laxative for disimpaction and maintenance in children with functional constipation. It is effective and well tolerated. Loperamide is an antidiarrheal and is contraindicated, while other agents are second-line.

Question 37Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 15-year-old presents with a 2-month history of intermittent bloody diarrhea, urgency, and abdominal pain. Colonoscopy reveals continuous mucosal inflammation from the rectum extending proximally. Which of the following is the most likely diagnosis?

  1. Ulcerative colitis Correct answer.
  2. Irritable bowel syndrome
  3. Crohn disease
  4. Celiac disease

Explanation

Continuous mucosal inflammation beginning in the rectum and extending proximally is characteristic of ulcerative colitis. Crohn disease typically shows skip lesions and transmural inflammation. Irritable bowel syndrome and celiac disease do not cause bloody diarrhea with continuous colitis.

Question 38Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 2-year-old is brought to the clinic with a 1-month history of poor appetite, irritability, and developmental delay. Examination reveals pallor, hepatomegaly, and a fanconi-like syndrome with aminoaciduria and glycosuria. Which of the following is the most likely diagnosis?

  1. Galactosemia
  2. Hereditary fructose intolerance
  3. Tyrosinemia type I Correct answer.
  4. Wilson disease

Explanation

Tyrosinemia type I can present with hepatic failure, renal tubular dysfunction (Fanconi syndrome), and developmental delay. Wilson disease typically presents in older children with liver or neurologic symptoms. Galactosemia and hereditary fructose intolerance present with vomiting and liver dysfunction after exposure to the offending sugar.

Question 39Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 10-year-old with a history of recurrent abdominal pain is diagnosed with functional abdominal pain. Which of the following is the most effective initial treatment approach?

  1. Antibiotic therapy
  2. Lactose-free diet
  3. Antispasmodic medication
  4. Reassurance and education Correct answer.

Explanation

For functional abdominal pain, reassurance and education about the benign nature of the condition are the cornerstone of management. Dietary elimination and pharmacotherapy are not first-line and may reinforce illness behavior.

Question 40Clinical Pediatric Gastroenterology, Hepatology, and Nutrition

A 13-year-old with obesity presents with right upper quadrant pain and jaundice. Ultrasound shows gallstones and a dilated common bile duct. Which of the following is the most appropriate management?

  1. Observation
  2. Ursodeoxycholic acid therapy
  3. Laparoscopic cholecystectomy
  4. Endoscopic retrograde cholangiopancreatography Correct answer.

Explanation

A dilated common bile duct with jaundice suggests choledocholithiasis, which is best managed initially with endoscopic retrograde cholangiopancreatography to remove the stone, followed by cholecystectomy. Ursodeoxycholic acid is not effective for stone removal, and observation risks complications.

Question 41Growth, Development, and Nutritional Assessment

A 6-month-old infant's weight-for-length is plotted between the 50th and 85th percentiles. How should this growth parameter be interpreted?

  1. It suggests a chronic illness
  2. It indicates overweight for length
  3. It lies within the normal range for age and sex Correct answer.
  4. It indicates failure to thrive

Explanation

Weight-for-length between the 15th and 85th percentiles is generally considered normal. Values above the 85th percentile raise concern for overweight, and values below the 5th percentile suggest undernutrition. A single point between the 50th and 85th percentiles is reassuring.

Question 42Growth, Development, and Nutritional Assessment

Which measurement is the most sensitive single indicator of acute malnutrition in a young child?

  1. Triceps skinfold thickness
  2. Mid-upper arm circumference
  3. Head circumference
  4. Weight-for-height z-score Correct answer.

Explanation

Weight-for-height reflects current nutritional status and is the recommended index for detecting acute (wasting) malnutrition. It responds rapidly to recent energy deficit. Head circumference reflects brain growth, and skinfold and arm circumference are supportive measures.

Question 43Growth, Development, and Nutritional Assessment

By approximately what age does a healthy term infant typically double their birth weight?

  1. 5 months Correct answer.
  2. 2 months
  3. 9 months
  4. 12 months

Explanation

Term infants usually double birth weight by about 4 to 5 months and triple it by about 12 months. This pattern is a standard milestone used to assess early growth. Doubling by 2 months would be unusually rapid.

Question 44Growth, Development, and Nutritional Assessment

Which laboratory marker is most useful for detecting iron deficiency before anemia develops?

  1. Serum ferritin Correct answer.
  2. Hemoglobin concentration
  3. Mean corpuscular volume
  4. Platelet count

Explanation

Iron stores are depleted before hemoglobin falls, so serum ferritin is an early indicator of iron deficiency. Low ferritin reflects reduced body iron stores. Hemoglobin and MCV fall later, once iron deficiency anemia is established.

Question 45Growth, Development, and Nutritional Assessment

A toddler's length-for-age is at the 3rd percentile and has fallen from the 25th percentile over 12 months. What is the most appropriate interpretation?

  1. Normal familial short stature
  2. Constitutional delay of growth
  3. Pathologic growth faltering requiring evaluation Correct answer.
  4. Measurement error only

Explanation

Crossing downward across major percentile lines indicates growth faltering and warrants evaluation for nutritional, endocrine, or chronic disease causes. Familial short stature and constitutional delay typically show growth parallel to normal curves. A single low percentile without change is less concerning than a falling trajectory.

Question 46Growth, Development, and Nutritional Assessment

Which dietary practice most increases the risk of iron deficiency in a 12-month-old?

  1. Introduction of pureed vegetables
  2. Introduction of iron-fortified cereal
  3. Exclusive breastfeeding beyond 6 months without iron supplementation Correct answer.
  4. Use of cow's milk after 12 months

Explanation

Breast milk is low in iron, and exclusive breastfeeding beyond about 6 months without iron-rich complementary foods or supplementation predisposes to iron deficiency. Iron-fortified cereals and appropriate complementary feeding help meet requirements.

Question 47Growth, Development, and Nutritional Assessment

A 4-year-old has a body mass index at the 97th percentile for age and sex. How is this classified?

  1. Normal weight
  2. Overweight
  3. Underweight
  4. Obesity Correct answer.

Explanation

In children aged 2 years and older, a BMI at or above the 95th percentile for age and sex defines obesity. The 85th to 94th percentile defines overweight. Normal weight lies between the 5th and 84th percentiles.

Question 48Growth, Development, and Nutritional Assessment

Which parameter best distinguishes constitutional delay of growth and puberty from growth hormone deficiency in an adolescent with short stature?

  1. Bone age relative to chronologic age Correct answer.
  2. Current height percentile
  3. Mid-parental height
  4. Body mass index

Explanation

Bone age is delayed in constitutional delay but typically normal or only mildly delayed in growth hormone deficiency. Comparing bone age with chronologic age helps separate the two. Height percentile and parental height inform the overall picture but do not distinguish the diagnoses.

Question 49Growth, Development, and Nutritional Assessment

What is the recommended first step in the nutritional assessment of a hospitalized child with poor intake?

  1. Order a bone age radiograph
  2. Obtain a comprehensive metabolic panel
  3. Start parenteral nutrition
  4. Perform a structured nutrition history and anthropometry Correct answer.

Explanation

Nutritional assessment begins with a structured history (intake, weight loss, symptoms) plus anthropometric measurements. Laboratory testing and imaging are targeted based on those findings. Parenteral nutrition is reserved for specific indications.

Question 50Growth, Development, and Nutritional Assessment

A breastfed newborn is exclusively fed human milk. Which supplement is routinely recommended to prevent deficiency?

  1. Vitamin C
  2. Iron
  3. Zinc
  4. Vitamin D Correct answer.

Explanation

Human milk contains little vitamin D, so daily vitamin D supplementation is recommended for breastfed infants. Iron supplementation may be considered later, but vitamin D is the routine early supplement. Vitamin C and zinc are generally adequate in breast milk.